GB1108686A - Process for purifying crude pyridine bases - Google Patents

Process for purifying crude pyridine bases

Info

Publication number
GB1108686A
GB1108686A GB12602/66A GB1260266A GB1108686A GB 1108686 A GB1108686 A GB 1108686A GB 12602/66 A GB12602/66 A GB 12602/66A GB 1260266 A GB1260266 A GB 1260266A GB 1108686 A GB1108686 A GB 1108686A
Authority
GB
United Kingdom
Prior art keywords
water
bases
azeotropic
impurities
pyridine bases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12602/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Gas Chemical Co Inc
Original Assignee
Japan Gas Chemical Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Gas Chemical Co Inc filed Critical Japan Gas Chemical Co Inc
Publication of GB1108686A publication Critical patent/GB1108686A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Abstract

Crude pyridine bases are purified by rectifying them together with 5 to 50% by weight of water based on the weight of the bases to form an azeotropic mixture of the pyridine base and the water and separating the mixture from the impurities contained in the starting pyridine bases. The rectification may be effected at 71-144 DEG C. and after the distillation, four fractions are obtained, i.e. (a) an azeotropic fraction consisting of various impurities and water; (b) an azeotropic fraction consisting of the pure product and water; (c) anhydrous pure product; and (d) the still residue, and the amounts of the above fractions obtained may be regulated by varying the amount of water employed. Any product in fraction (a) may be recovered by conventional means and the whole process may be effected continuously. Impurities which may be removed by the process include benzene, toluene, o-, m- and p-xylenes, methacrylonitrile, isobutyronitrile and dimethylamino acetonitrile, permanganate reducible materials and Ehrlich's reagent positive material. A form of apparatus suitable for carrying out the process is described. Reference has been directed by the Comptroller to Specification 766,387.
GB12602/66A 1965-03-22 1966-03-22 Process for purifying crude pyridine bases Expired GB1108686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1663065 1965-03-22

Publications (1)

Publication Number Publication Date
GB1108686A true GB1108686A (en) 1968-04-03

Family

ID=11921667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12602/66A Expired GB1108686A (en) 1965-03-22 1966-03-22 Process for purifying crude pyridine bases

Country Status (2)

Country Link
US (1) US3493473A (en)
GB (1) GB1108686A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4883881A (en) * 1988-04-27 1989-11-28 Nepera, Inc. Preparation of UV grade synthetic pyridine
US5100514A (en) * 1991-03-01 1992-03-31 Lloyd Berg Separation of pyridine from water by extractive distillation
CN101973931B (en) * 2010-10-28 2012-05-23 攀钢集团钢铁钒钛股份有限公司 Method for extracting pyridine from ammonium sulfate mother liquor
CN113321613B (en) * 2021-06-24 2022-10-14 索闻特环保科技(上海)有限公司 Method for treating mixed liquid containing acetonitrile, 3-methylpyridine and water

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755282A (en) * 1956-07-17 hachmuth
US2350447A (en) * 1944-06-06 Separation of pyrrole
US2425220A (en) * 1947-08-05 Isolation of pyrrole from pyridine
US2363157A (en) * 1943-05-08 1944-11-21 Allied Chem & Dye Corp Process for purifying piperidine
US2363158A (en) * 1943-05-08 1944-11-21 Allied Chem & Dye Corp Process for the purification of piperidine
US2439777A (en) * 1944-09-18 1948-04-13 Union Oil Co Separation of thiophenes from hydrocarbons by azeotropic distillation
US2717232A (en) * 1950-05-13 1955-09-06 Ruetgerswerke Ag Dehydration and fractionation of crude pyridine
US2885402A (en) * 1953-04-01 1959-05-05 Celanese Corp Production of piperidines
US2853489A (en) * 1953-12-28 1958-09-23 Phillips Petroleum Co Pyridine extraction process
US2708653A (en) * 1954-02-18 1955-05-17 American Cyanamid Co Purification of pyridine bases by distillation

Also Published As

Publication number Publication date
US3493473A (en) 1970-02-03

Similar Documents

Publication Publication Date Title
FR2323665A1 (en) PROCESS FOR SEPARATING A MIXTURE OF GASEOUS HYDROCARBONS
FR2329623A1 (en) PROCESS FOR SEPARATING PARA-XYLENE FROM A MIXTURE OF THE SAME WITH ANOTHER AROMATIC HYDROCARBIDE
GB1179630A (en) Process for Separating Crude Unsaturated Nitriles
ES398777A1 (en) Process for the recovery of isoprene from mixtures containing the same
GB1387573A (en) Process for the separation of monoethanolamine diethanolamine and triethanolamine from crude ethanolamine mixtures
ATE91277T1 (en) PROCESS FOR THE SEPARATION OF HYDROGEN FLUOROUS, 1,1-DICHLORO-1-FLUOROETHANE AND 1-CHLORO-1,1DIFLUOROETHANE FROM THEIR MIXTURES.
GB1108686A (en) Process for purifying crude pyridine bases
EP0284971A3 (en) Process for the production of 1,3-butadien
KR960014076A (en) Method for producing pure benzene and pure toluene
GB1308718A (en) Method of separating vinyl acetate from liquid mixtures
GB1428228A (en) Process for recovering saturated hydrocarbons
ES428042A1 (en) Process for separating water from organic multiple component mixtures by distillation
RO73091A (en) PROCESS FOR SEPARATING ISOPRENE / N-PENTAN AZEOTROPE FROM A MIXTURE OF HYDROCARBONS
DE3679187D1 (en) METHOD FOR SEPARATING AROMATES FROM HYDROCARBON MIXTURES OF ANY AROMATE CONTENT.
GB1283180A (en) A method of obtaining high-purity aromatics from hydrocarbon mixtures which in addition to said aromatics contain non-aromatics
CA2008029A1 (en) Method of working up a raffinate of an extractive distillation of a hydrocarbon mixture and apparatus for same
BE825173A (en) PROCESS FOR SEPARATING AROMATIC HYDROCARBONS FROM A FEED CONSISTING OF A MIXTURE OF HYDROCARBONS
GB1432690A (en) Process for separating high purity aromatic hydrocarbons from mixtures containing them
SU563910A3 (en) Method of isolating styrene from hydrocarbon mixtures
GB719911A (en) Purifying acrylonitrile by extractive distillation
GB1391870A (en) Process for the production of highpurity aromatics by liquid- liquid extraction and or extractive distillation from hydrocarbon mixtures
GB1343652A (en) Process for separating aromatic hydrocarbons
ES428740A1 (en) Solvent separation of diolefins from mixtures containing the same
GB1144067A (en) Processes for separating m-xylene from mixture of xylene isomers
GB1274380A (en) Process for the separation of hydrocarbon mixtures by extractive distillation